Reactive transport at stressed grain contact and creep compaction of quartz sand

High-frequency dispersion from viscous drag at the grain-grain contact in water-saturated sand.

Shear viscous drag within the thin fluid film at the contact between grains in water-saturated sand is an important loss mechanism for high-frequency sound in the Biot-Stoll plus contact squirt flow and shear viscous drag (BICSQS) model [J. Acoust. Soc. Am. 116, 2011-2022 (2004)]. Couette flow was assumed for the shear drag but it breaks down when inertial effects within the film become signifi...

Wave Propagation in Water‐saturated Sand and Grain Contact Physics

Measurements in sandy ocean sediments over a broad range of frequencies show that the sound speed dispersion is significantly greater than that predicted by the Biot-Stoll model with constant coefficients, and the observed sound attenuation does not seem to follow a consistent power law. The observations may be explained in terms of the Biot-Stoll model with frequency-dependent complex frame bu...

Constraints on compaction rate and equilibrium in the pressure solution creep of quartz aggregates and fractures: Controls of aqueous concentration

[1] A relationship is developed to examine dissolution precipitation creep in crustal rocks with implicit coupling of the dissolution‐diffusion‐precipitation system and without requiring the iterative solution of a linear equation system. Implicit control is maintained over aqueous silica concentrations within hydrated solid contacts and in open pore space. For arbitrary conditions of temperatu...

Effects of Phosphate on the Transport of Escherichia Coli in Saturated Quartz Sand

Transport of Pseudomonas fluorescens strain P17 through quartz sand columns as a function of water content

Porous media column experiments were used to investigate Pseudomonas fluorescens strain P17 transport as a function of water content and the influences of the solid–liquid and gas–liquid interfaces. Retention of radiolabeled P17 in washed quartz sand was evaluated at 100, 84, and 46% water saturation. At the completion of each experiment, the porous medium was extruded and sampled directly for ...